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g Letters Patent dated February 6,1877; application filed September 16,1876.

To all whom it may concern:

Be it known that we, JAMES F. HALL and ELBERT P. 000K, of Havana, in thecounty of Schuyler and State of New York, have invented a new andvaluable Improvement in Bench-Vises and We do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being bad to the annexed drawings,making a part of this specification, and to the letters and figures ofreference marked thereon.

Figure l of the drawings is a representa tion of a side elevation of onejaw of a benchvise, and Fig. 2 is a plan view of the same. Fig. 3 is aplan View of the lower plate detached, and Fig. 4 is a central verticalsectional view of one jaw of a bench-vise; and Fig. 5 is a bottom viewof the upper plate detached.

The object of this invention is to provide means for adjustingbench-vises at various angles to carpenters, metal-workers, or otherbenches. We attain this object by employing a rotating disk or plate,which carries a spring actuated rod, in combination with a similar fixeddisk or plate, which is provided with a semicircular series ofperforations, and is secured to the bench, all as hereinafterparticularly set forth and claimed.

In the accompanying drawing, A designates the fixed jaw of a bench-vise,and A the base block of said jaw. As ordinarily constructed, saidbase-block would be secured directly to the bench; but we secure saidjaw to the top or outer side of a plate or disk, B, which is provided onits under side with a circular central hub or block, B. Said hub isreceived and turns in a corresponding central perforation, 0, of a fixedlower plate, 0. Said disks or plates B O are prevented from separatingby means of a washer, D, which sets against the under side of plate 0,and through which washer a fastening-screw, E, passes into hub B of diskor plate B. Lower plate 0 is fastened to the bench by means of bolts orscrews passing through perforated lugs F F of said plate; and said upperplate B turns freely upon said under plate, as the plates or disksconstituting the fifth-wheel of a wagon turn upon one another. In thisway, while jaw A remains (as stated) fixed so far as concerns itsposition in relation to the other jaw of the vise, the inclination ofthe faces of the jaws of the vise to the edge of the bench can be variedat will.

The movable jaw of the vise is connected with the fixed jaw in theordinary manner, and by means of a screw or otherwise is made toapproach or recede from the fixed jaw as in the vises in common use, myimprovements relating entirely to the fixed jaw.

It is necessary to have means for locking said vise in any position thusgiven to it. This locking we accomplish by means of the followingdevices: In the upper face of fixed disk 0 (that face against which diskB turns) we make a semicircular series of recesses, 0 c. The upper edgesof said recesses are protected by a segmental metal shield, G, which islet into said fixed disk 0, so as to be flush with the remainder of thesurface of said disk. Said shield G is perforated tocorrespon'd withsaid series of recesses. In the upper rotating disk B there is a singleperforation, in which is secured a tube or thimble, H, at right angleswith the plane of said disk. The top of said tube is provided with ahead, h. I designates a plunger-rod, which nearly fills said tube H, andreciprocates longitudinally therein, as hereinafter set forth. Saidplunger-rod is provided with a diminished shank, t, which passes upthrough a perforation in said tube-head h, and is provided with a buttonor small disk, I, on its outer extremity. The office of said button I isto limit the downward or inward play of said plunger-rod, and also toafford a convenient handle for withdrawing the same. J designates ahelical spring, which surrounds shank t, and operates to depressplunger-rod I.

When disk B is turned the end of said plunger-rod slides over shield Gruntil one of the recesses c c is reached. Spring J then forces saidplunger-rod into said recess, thereby locking the device in the positionwhich it then occupies. To change this position, said plunger-rod iswithdrawn by means of button I, and disk B is turned until plunger-rod Ienters the recess, which looks the device in the position desired.

Instead of recesses, c 0 may be perforations passing entirely throughdisk .or plate 0; Said disks v or plates B'O'may be considerablyvaried'in external shape, and numerous other I changes may be madewithout departing from the spirit of my invention. 7

What we claim as new, and desire to secure by Letters Patent, is-- Inthe fixed jaw of a vise, the combination of the disk 0, having recessesc c, with the rotating disk B, thimble H, plunger I, and

P J, fi b tent l y s and for the purpose set forth, A 7 A i HQ Q iJIHOJIy that we claim' the above we have hereunto subscribed onr' namesinthe

